async Task IDeckService.FavouriteDeckAsync(int id, int userId, bool favourite, CancellationToken cancellationToken)
{
var deck = await _deckRepository.GetDeckByIdAsync(id, userId, cancellationToken : cancellationToken);
if (deck == null)
{
throw new InvalidDeckException($"Deck { id } does not exist.");
}
await _deckRepository.FavouriteDeckAsync(id, userId, favourite, cancellationToken : cancellationToken);
}
